Fish Surveys
Metadata
| Number of fish surveys per location, habitat, and exposure | ||||||
|---|---|---|---|---|---|---|
| Exposure | Strata | # Sites | # Transects | # Reels | Surveyed distance (m) | |
| Fanna | ||||||
| Forereef | Leeward | 2 | 1 | 2 | 6 | 150 |
| Forereef | Windward | 2 | 5 | 10 | 30 | 750 |
| Total | — | — | 6 | 12 | 36 | 900 |
| Helen | ||||||
| Backreef | Lagoon | 1 | 1 | 2 | 6 | 150 |
| Patchreef | Lagoon | 2 | 3 | 6 | 18 | 450 |
| Forereef | Leeward | 2 | 6 | 12 | 36 | 900 |
| Forereef | Windward | 2 | 5 | 10 | 30 | 750 |
| Total | — | — | 15 | 30 | 90 | 2250 |
| Merir | ||||||
| Forereef | Leeward | 2 | 3 | 6 | 18 | 450 |
| Forereef | Windward | 2 | 4 | 8 | 24 | 600 |
| Total | — | — | 7 | 14 | 42 | 1050 |
| Pulo Anna | ||||||
| Forereef | Leeward | 2 | 2 | 4 | 12 | 300 |
| Forereef | Windward | 2 | 2 | 4 | 12 | 300 |
| Total | — | — | 4 | 8 | 24 | 600 |
| Sonsorol | ||||||
| Forereef | Leeward | 2 | 4 | 8 | 24 | 600 |
| Forereef | Windward | 2 | 3 | 6 | 18 | 450 |
| Total | — | — | 7 | 14 | 42 | 1050 |
| Tobi | ||||||
| Forereef | Leeward | 2 | 5 | 10 | 30 | 750 |
| Forereef | Windward | 2 | 1 | 2 | 6 | 150 |
| Total | — | — | 6 | 12 | 36 | 900 |
| Grand total | — | — | 45 | 90 | 270 | 6750 |
QA/QC
Taxa
Observations
Expedition Summary
| Average species richness, abundance, and biomass | ||||||
|---|---|---|---|---|---|---|
| Sites | # Transects | # Reels | # Taxa | Abundance (ind/m2)1 | Biomass (g/m2)1 | |
| By exposure | ||||||
| Lagoon | 4 | 8 | 24 | 67.88 | 8.04 (7.53) | 191.03 (73.56) |
| Leeward | 21 | 42 | 126 | 67.29 | 9.64 (6.72) | 636.46 (264.39) |
| Windward | 20 | 40 | 120 | 72.88 | 12.94 (8.39) | 857.42 (570.15) |
| By strata | ||||||
| Deep | 44 | 45 | 135 | 69.44 | 10.42 (7.46) | 799.14 (540.27) |
| Shallow | 44 | 45 | 135 | 70.20 | 11.51 (8.00) | 591.00 (336.92) |
| Overall | ||||||
| Total | 45 | 90 | 270 | 69.82 | 10.96 (7.71) | 695.07 (459.76) |
| 1 Standard deviation in parenthesis | ||||||
Location summary
| Average species richness, abundance, and biomass by location | ||||||
|---|---|---|---|---|---|---|
| Sites | # Transects | # Reels | # Taxa | Abundance (ind/m2) | Biomass (g/m2) | |
| Fanna | ||||||
| Deep | 6 | 6 | 18 | 77.50 | 13.76 | 751.83 |
| Shallow | 6 | 6 | 18 | 60.83 | 14.36 | 328.81 |
| Overall | — | 12 | 36 | 69 | 14 | 540 |
| Helen | ||||||
| Deep | 14 | 15 | 45 | 67.80 | 6.82 | 696.49 |
| Shallow | 14 | 15 | 45 | 74.87 | 9.73 | 646.62 |
| Overall | — | 30 | 90 | 71 | 8 | 672 |
| Merir | ||||||
| Deep | 7 | 7 | 21 | 67.57 | 6.33 | 875.68 |
| Shallow | 7 | 7 | 21 | 73.43 | 5.68 | 697.21 |
| Overall | — | 14 | 42 | 70 | 6 | 786 |
| Pulo Anna | ||||||
| Deep | 4 | 4 | 12 | 61.25 | 17.72 | 1431.37 |
| Shallow | 4 | 4 | 12 | 67.50 | 10.43 | 756.46 |
| Overall | — | 8 | 24 | 64 | 14 | 1094 |
| Sonsorol | ||||||
| Deep | 7 | 7 | 21 | 72.57 | 17.38 | 552.88 |
| Shallow | 7 | 7 | 21 | 64.00 | 17.22 | 422.41 |
| Overall | — | 14 | 42 | 68 | 17 | 488 |
| Tobi | ||||||
| Deep | 6 | 6 | 18 | 69.50 | 7.87 | 879.63 |
| Shallow | 6 | 6 | 18 | 73.17 | 13.96 | 676.63 |
| Overall | — | 12 | 36 | 71 | 11 | 778 |
Analyses
Richness
| Results of Adonis model for univariate analysis of fish species richness | |||||
|---|---|---|---|---|---|
| df | SumOfSqs | R2 | statistic | p.value | |
| depth_strata | 1 | 17.187 | 0.001 | 0.134 | 0.710 |
| location | 5 | 700.063 | 0.061 | 1.095 | 0.377 |
| exposure | 1 | 865.000 | 0.075 | 6.763 | 0.014 |
| habitat | 1 | 17.074 | 0.001 | 0.133 | 0.704 |
| diver | 1 | 18.771 | 0.002 | 0.147 | 0.688 |
| Residual | 79 | 10104.930 | 0.877 | NA | NA |
| Total | 89 | 11527.156 | 1.000 | NA | NA |
Abundance
| Results of Adonis model for univariate analysis of fish abundance | |||||
|---|---|---|---|---|---|
| df | SumOfSqs | R2 | statistic | p.value | |
| depth_strata | 1 | 29.318 | 0.006 | 0.767 | 0.397 |
| location | 5 | 1245.230 | 0.235 | 6.515 | 0.002 |
| exposure | 1 | 229.449 | 0.043 | 6.003 | 0.016 |
| habitat | 1 | 2.019 | 0.000 | 0.053 | 0.836 |
| diver | 1 | 695.530 | 0.132 | 18.196 | 0.001 |
| Residual | 79 | 3019.706 | 0.571 | NA | NA |
| Total | 89 | 5289.048 | 1.000 | NA | NA |
Biomass
| Results of Adonis model for univariate analysis of fish biomass | |||||
|---|---|---|---|---|---|
| df | SumOfSqs | R2 | statistic | p.value | |
| diver | 1 | 281913.07 | 0.015 | 2.014 | 0.173 |
| depth_strata | 1 | 965942.72 | 0.051 | 6.899 | 0.010 |
| habitat | 1 | 16539.82 | 0.001 | 0.118 | 0.682 |
| exposure | 1 | 1580881.99 | 0.084 | 11.291 | 0.002 |
| location | 5 | 3247391.55 | 0.173 | 4.639 | 0.002 |
| Residual | 79 | 11060545.73 | 0.588 | NA | NA |
| Total | 89 | 18812734.31 | 1.000 | NA | NA |
By depth
By exposure
| Average species richness, abundance, and biomass by location and exposure | ||||||
|---|---|---|---|---|---|---|
| Sites | # Transects | # Reels | # Taxa | Abundance (ind/m2) | Biomass (g/m2) | |
| Fanna | ||||||
| Leeward | 1 | 2 | 6 | 69.50 | 10.40 | 812.14 |
| Windward | 5 | 10 | 30 | 69.10 | 14.79 | 485.95 |
| Helen | ||||||
| Lagoon | 4 | 8 | 24 | 67.88 | 8.04 | 191.03 |
| Leeward | 6 | 12 | 36 | 66.42 | 6.01 | 544.84 |
| Windward | 5 | 10 | 30 | 80.00 | 11.18 | 1208.03 |
| Merir | ||||||
| Leeward | 3 | 6 | 18 | 68.17 | 5.40 | 867.84 |
| Windward | 4 | 8 | 24 | 72.25 | 6.46 | 725.40 |
| Pulo Anna | ||||||
| Leeward | 2 | 4 | 12 | 62.00 | 13.51 | 667.86 |
| Windward | 2 | 4 | 12 | 66.75 | 14.64 | 1519.97 |
| Sonsorol | ||||||
| Leeward | 4 | 8 | 24 | 65.50 | 13.97 | 399.07 |
| Windward | 3 | 6 | 18 | 72.00 | 21.74 | 605.73 |
| Tobi | ||||||
| Leeward | 5 | 10 | 30 | 70.90 | 11.36 | 749.79 |
| Windward | 1 | 2 | 6 | 73.50 | 8.67 | 919.82 |
By family
By trophic group
By species
| Top 30 fish species with highest contribution to overall fish biomass | |||||||
|---|---|---|---|---|---|---|---|
| Trophic/Family | Taxon | Min length (cm) | Mean length (cm) | Max length (cm) | Frequency (% stations) | Abundance (ind/m2)1 | Biomass (g/m2)1 |
| Planktivore | |||||||
| Fusilier | Pterocaesio tile | 15.5 | 21.08 | 28.5 | 65.56 | 0.50 (4.59 %) | 100.69 (14.49 %) |
| Surgeonfish | Naso hexacanthus | 35.0 | 49.13 | 60.0 | 60.00 | 0.03 (0.30 %) | 78.20 (11.25 %) |
| Fusilier | Caesio teres | 12.0 | 22.88 | 32.5 | 48.89 | 0.16 (1.42 %) | 34.25 (4.93 %) |
| Snapper | Macolor macularis | 10.0 | 42.72 | 60.0 | 80.00 | 0.02 (0.17 %) | 28.59 (4.11 %) |
| Fusilier | Pterocaesio randalli | 16.0 | 19.23 | 25.0 | 24.44 | 0.22 (2.02 %) | 24.44 (3.52 %) |
| Fusilier | Caesio lunaris | 20.0 | 23.88 | 32.5 | 30.00 | 0.06 (0.58 %) | 24.27 (3.49 %) |
| Surgeonfish | Naso vlamingii | 20.0 | 37.56 | 55.0 | 73.33 | 0.01 (0.13 %) | 18.46 (2.66 %) |
| Fusilier | Pterocaesio pisang | 9.5 | 14.12 | 17.5 | 21.11 | 0.30 (2.77 %) | 14.75 (2.12 %) |
| Surgeonfish | Naso annulatus | 50.0 | 62.26 | 76.5 | 22.22 | 0.00 (0.02 %) | 12.27 (1.77 %) |
| Surgeonfish | Acanthurus thompsoni | 7.5 | 16.63 | 23.0 | 73.33 | 0.11 (1.04 %) | 12.04 (1.73 %) |
| Damselfish | Lepidozygus tapeinosoma | 4.0 | 7.26 | 10.5 | 25.56 | 1.27 (11.58 %) | 11.19 (1.61 %) |
| Fusilier | Pterocaesio tessellata | 14.0 | 19.20 | 25.0 | 15.56 | 0.07 (0.66 %) | 10.97 (1.58 %) |
| Damselfish | Chromis ternatensis | 2.0 | 6.57 | 10.5 | 74.44 | 0.88 (7.98 %) | 10.52 (1.51 %) |
| Soldierfish | Myripristis kuntee | 13.0 | 16.52 | 21.0 | 63.33 | 0.06 (0.53 %) | 8.15 (1.17 %) |
| Soldierfish | Myripristis berndti | 7.0 | 22.26 | 29.0 | 56.67 | 0.04 (0.34 %) | 7.38 (1.06 %) |
| Triggerfish | Odonus niger | 16.0 | 23.26 | 28.0 | 15.56 | 0.02 (0.19 %) | 6.83 (0.98 %) |
| Soldierfish | Myripristis vittata | 8.0 | 16.16 | 18.0 | 46.67 | 0.07 (0.67 %) | 6.81 (0.98 %) |
| Damselfish | Pycnochromis margaritifer | 2.5 | 4.96 | 5.5 | 87.78 | 3.08 (28.13 %) | 6.09 (0.88 %) |
| Fusilier | Caesio caerulaurea | 13.5 | 21.58 | 28.0 | 7.78 | 0.03 (0.27 %) | 5.31 (0.76 %) |
| Snapper | Macolor niger | 28.0 | 44.18 | 60.0 | 12.22 | 0.00 (0.03 %) | 4.68 (0.67 %) |
| Top-predator | |||||||
| Jack | Caranx sexfasciatus | 52.5 | 56.25 | 62.5 | 4.44 | 0.00 (0.04 %) | 13.95 (2.01 %) |
| Jack | Caranx papuensis | 35.0 | 43.33 | 55.0 | 2.22 | 0.02 (0.15 %) | 13.49 (1.94 %) |
| Jack | Elagatis bipinnulata | 30.0 | 56.34 | 67.5 | 13.33 | 0.01 (0.12 %) | 12.70 (1.83 %) |
| Snapper | Lutjanus bohar | 8.0 | 40.42 | 80.0 | 68.89 | 0.01 (0.08 %) | 10.66 (1.53 %) |
| Jack | Caranx melampygus | 22.0 | 44.12 | 85.0 | 44.44 | 0.00 (0.04 %) | 5.96 (0.86 %) |
| Snapper | Lutjanus gibbus | 25.0 | 33.34 | 41.0 | 32.22 | 0.01 (0.10 %) | 4.96 (0.71 %) |
| Herbivore | |||||||
| Parrotfish | Scarus rubroviolaceus | 6.0 | 39.78 | 65.0 | 54.44 | 0.01 (0.05 %) | 7.61 (1.09 %) |
| Parrotfish | Chlorurus microrhinos | 5.0 | 44.64 | 65.0 | 35.56 | 0.00 (0.03 %) | 5.77 (0.83 %) |
| Chub | Kyphosus cinerascens | 13.0 | 32.38 | 45.0 | 23.33 | 0.01 (0.09 %) | 5.73 (0.82 %) |
| Surgeonfish | Naso unicornis | 38.0 | 46.67 | 58.0 | 15.56 | 0.00 (0.02 %) | 5.28 (0.76 %) |
| 1 Percent contribution in parenthesis | |||||||